I understand now. I'm not sure how the PARISC implementation can be
correct in this light.
According to cachetlb.txt:
void flush_anon_page(struct page *page, unsigned long vmaddr)
When the kernel needs to access the contents of an anonymous
page, it calls this function (currently only
get_user_pages()). Note: flush_dcache_page() deliberately
doesn't work for an anonymous page. The default
implementation is a nop (and should remain so for all coherent
architectures). For incoherent architectures, it should flush
the cache of the page at vmaddr in the current user process.
^^^^^^^^^^^^^^^^^^^^
Is the documentation wrong?
randolph
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